Tank 3: 152 gal Large Polypterus Tank

My third largest tank has been devoted to some of my larger Polypterus (Bichirs).

Tank Size (LxWxH)	8'x 2.5' x 16" (254 x 76 x 40cm)
Volume	Nominal: 152 imp gallons/183 US gallons/690 litres
Filtration	Two home made glass built-in multi-compartment filters with settlement chamber, mechanical filtration though sponge layers, main biofiltration through ceramic media and a return chamber with pump.
Heating	Heated room
Lighting	Low - fluorescent room lighting only.
Substrate	Thin layer of aquarium sand.
Decor	Bogwood, large smooth rocks.
Background	3-D effect artificial background
Water parameters	Temp=26oC ; pH=7.0-7.2 ; GH=3 ; KH=2 30% water change every week.
Fish stock	2 Polypterus congicus (15") Polypterus ornatipinnis (18") Polypterus weeksii (14") Polypterus endlicheri (10") 4 Polypterus lapradei (9-12") Polypterus bichir (9")

Polypterus congicus	Polypterus ornatipinnis

This tank has a large 8 x 2.5 ft base area but is not very tall, which is unnecessary for the bottom-dwelling Polypterus. The tank has a removable divider in the centre, mainly so that the species can be separated if required for spawning attempts. The divider is made from drilled plastic so that water flows between both halves. The filters built into both rear corners ensure good filtration and circulation in both sides.

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